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- Gwinnett, GA: Chemistry (2018)
Gwinnett, GA: Chemistry (2018)
1: plan and carry out appropriate safety practices for equipment used for all classroom laboratory and field experiences
1.b: demonstrate appropriate and safe techniques in all laboratory situations
Measuring Volume
Measure the volume of liquids and solids using beakers, graduated cylinders, overflow cups, and rulers. Water can be poured from one container to another and objects can be added to containers. A pipette can be used to transfer small amounts of water, and a magnifier can be used to observe the meniscus in a graduated cylinder. Test your volume-measurement skills in the "Practice" mode of the Gizmo. 5 Minute Preview
2: obtain, evaluate, and communicate information about the chemical and physical properties of matter resulting from the ability of atoms to form bonds
2.a: plan and carry out an investigation about the physical and chemical properties at the macroscopic scale
Calorimetry Lab
Investigate how calorimetry can be used to find relative specific heat values when different substances are mixed with water. Modify initial mass and temperature values to see effects on the system. One or any combination of the substances can be mixed with water. A dynamic graph (temperature vs. time) shows temperatures of the individual substances after mixing. 5 Minute Preview
Freezing Point of Salt Water
Control the temperature of a beaker of water. As the temperature drops below the freezing point, a transformation of state will occur that can be viewed on a molecular level. Salt can be added to the water to see its effect on the freezing point of water. 5 Minute Preview
Mystery Powder Analysis
Perform multiple experiments using several common powders such as corn starch, baking powder, baking soda, salt, and gelatin. The results of the research on the known powders can then be used to analyze several unknowns using the scientific method. The unknowns can be a single powder or a combination of the known powders. 5 Minute Preview
Solubility and Temperature
Add varying amounts of a chemical to a beaker of water to create a solution, observe that the chemical dissolves in the water at first, and then measure the concentration of the solution at the saturation point. Either potassium nitrate or sodium chloride can be added to the water, and the temperature of the water can be adjusted. 5 Minute Preview
pH Analysis
Test the acidity of common substances using pH paper. Materials including soap, lemon juice, milk, and oven cleaner can be tested by comparing the color of pH strips to a standard scale. 5 Minute Preview
pH Analysis: Quad Color Indicator
Test the acidity of many common everyday substances using pH paper (four color indicators). Materials including soap, lemon juice, milk, and oven cleaner can be tested by comparing the color of the pH strips to the calibrated scale. 5 Minute Preview
2.b: use mathematical and conceptual thinking to solve density problems and understand the relationship between density, mass, and volume
Archimedes' Principle
Place weights into a boat and see how far the boat sinks into a tank of liquid. The depth of the boat can be measured, as well as the amount of liquid displaced. The dimensions of the boat and the density of the liquid can be adjusted. See how much weight the boat can hold before it sinks to the bottom! 5 Minute Preview
Density
Measure the mass and volume of a variety of objects, then place them into a beaker of liquid to see if they float or sink. Learn to predict whether objects will float or sink in water based on their mass and volume. Compare how objects float or sink in a variety of liquids, including gasoline, oil, seawater, and corn syrup. 5 Minute Preview
Density Experiment: Slice and Dice
Drop a chunk of material in a beaker of water and observe whether it sinks or floats. Cut the chunk into smaller pieces of any size, and observe what happens as they are dropped in the beaker. The mass and volume of each chunk can be measured to gain a clear understanding of density and buoyancy. 5 Minute Preview
Density Laboratory
With a scale to measure mass, a graduated cylinder to measure volume, and a large beaker of liquid to observe flotation, the relationship between mass, volume, density, and flotation can be investigated. The density of the liquid in the beaker can be adjusted, and a variety of objects can be studied during the investigation. 5 Minute Preview
Density via Comparison
Using four beakers of liquids with known densities, estimate the density of a variety of objects. Place each object into each beaker to see whether it sinks or floats, and then use this information to compare the densities of the objects. 5 Minute Preview
Determining Density via Water Displacement
Drop objects in a beaker that is filled with water, and measure the water that flows over the edge. Using Archimedes' principle, determine the density of objects based on the amount of displaced water. 5 Minute Preview
2.d: develop and use models to evaluate bonding configurations from nonpolar covalent to ionic bonding
Covalent Bonds
Choose a substance, and then move electrons between atoms to form covalent bonds and build molecules. Observe the orbits of shared electrons in single, double, and triple covalent bonds. Compare the completed molecules to the corresponding Lewis diagrams. 5 Minute Preview
Electrons and Chemical Reactions - High School
The Secret Service has arrested suspects accused of counterfeiting coins from 1915 valued at $50,000 each. The students act as a forensic scientist to investigate the crime scene and examine the evidence. Students learn about electrons and chemical reactions to recreate the methods used to make the coins and prepare evidence for the court case. Video Preview
Ionic Bonds
Simulate ionic bonds between a variety of metals and nonmetals. Select a metal and a nonmetal atom, and transfer electrons from one to the other. Observe the effect of gaining and losing electrons on charge, and rearrange the atoms to represent the molecular structure. Additional metal and nonmetal atoms can be added to the screen, and the resulting chemical formula can be displayed. 5 Minute Preview
Polarity and Intermolecular Forces
Combine various metal and nonmetal atoms to observe how the electronegativity difference determines the polarity of chemical bonds. Place molecules into an electric field to experimentally determine if they are polar or nonpolar. Create different mixtures of polar and nonpolar molecules to explore the intermolecular forces that arise between them. 5 Minute Preview
2.f: plan and carry out an investigation to gather evidence to compare the physical and chemical properties at the macroscopic scale to infer the strength of intermolecular and intramolecular forces
Polarity and Intermolecular Forces
Combine various metal and nonmetal atoms to observe how the electronegativity difference determines the polarity of chemical bonds. Place molecules into an electric field to experimentally determine if they are polar or nonpolar. Create different mixtures of polar and nonpolar molecules to explore the intermolecular forces that arise between them. 5 Minute Preview
Sticky Molecules
Learn about molecular polarity and how polarity gives rise to intermolecular forces. Measure four macroscopic properties of liquids (cohesion, adhesion, surface tension, and capillary rise). Compare these properties for different liquids and relate them to whether the substances are polar or nonpolar. 5 Minute Preview
2.g: construct an argument by applying principles of inter- and intra- molecular forces to identify substances based on chemical and physical properties
Polarity and Intermolecular Forces
Combine various metal and nonmetal atoms to observe how the electronegativity difference determines the polarity of chemical bonds. Place molecules into an electric field to experimentally determine if they are polar or nonpolar. Create different mixtures of polar and nonpolar molecules to explore the intermolecular forces that arise between them. 5 Minute Preview
Sticky Molecules
Learn about molecular polarity and how polarity gives rise to intermolecular forces. Measure four macroscopic properties of liquids (cohesion, adhesion, surface tension, and capillary rise). Compare these properties for different liquids and relate them to whether the substances are polar or nonpolar. 5 Minute Preview
2.i: use mathematics and computational thinking to express appropriate number of significant figures for calculated data using scientific notation where appropriate (Honors Extension)
Unit Conversions 2 - Scientific Notation and Significant Digits
Use the Unit Conversions Gizmo to explore the concepts of scientific notation and significant digits. Convert numbers to and from scientific notation. Determine the number of significant digits in a measured value and in a calculation. 5 Minute Preview
2.j: analyze and interpret data to solve scientific problems by substituting quantitative values, using dimensional analysis and/or simple algebraic functions as appropriate (Honors Extension)
Stoichiometry
Solve problems in chemistry using dimensional analysis. Select appropriate tiles so that units in the question are converted into units of the answer. Tiles can be flipped, and answers can be calculated once the appropriate unit conversions have been applied. 5 Minute Preview
Unit Conversions
Use unit conversion tiles to convert from one unit to another. Tiles can be flipped to cancel units. Convert between metric units or between metric and U.S. customary units. Solve distance, time, speed, mass, volume, and density problems. 5 Minute Preview
Unit Conversions 2 - Scientific Notation and Significant Digits
Use the Unit Conversions Gizmo to explore the concepts of scientific notation and significant digits. Convert numbers to and from scientific notation. Determine the number of significant digits in a measured value and in a calculation. 5 Minute Preview
3: obtain, evaluate, and communicate information about the use of the modern atomic theory and periodic law to explain the characteristics of atoms and elements
3.a: evaluate merits and limitations of different models (Clarification statement: Thompson, Rutherford, Bohr and the current model) of the atom in relation to relative size, charge, and position of protons, neutrons, and electrons in the atom
Bohr Model of Hydrogen
Shoot a stream of photons through a container of hydrogen gas. Observe how photons of certain energies are absorbed, causing the electron to move to different orbits. Build the spectrum of hydrogen based on photons that are absorbed and emitted. 5 Minute Preview
Bohr Model: Introduction
Fire photons to determine the spectrum of a gas. Observe how an absorbed photon changes the orbit of an electron and how a photon is emitted from an excited electron. Calculate the energies of absorbed and emitted photons based on energy level diagrams. The light energy produced by the laser can be modulated, and a lamp can be used to view the entire absorption spectrum at once. 5 Minute Preview
3.c: construct an explanation that relates the relative abundance of isotopes of a particular element to the atomic mass of the element
Average Atomic Mass
The atomic mass for each element listed in the periodic table is actually the weighted average mass of all of the different isotopes of the element. In the Average Atomic Mass Gizmo, use a mass spectrometer to separate an element into its isotopes. Then, calculate the average atomic mass by considering the mass and abundance of each isotope. 5 Minute Preview
Isotopes
Explore what isotopes are by adding protons and neutrons to the nucleus of an atom. Plot both stable and radioactive isotopes on a graph of neutrons vs. protons, and explore how the neutron:proton ratio of stable isotopes changes from lighter to heavier elements. 5 Minute Preview
3.d: use mathematics, computational and conceptual thinking to calculate average atomic mass and understand the relationship between relative abundance and average atomic mass
Average Atomic Mass
The atomic mass for each element listed in the periodic table is actually the weighted average mass of all of the different isotopes of the element. In the Average Atomic Mass Gizmo, use a mass spectrometer to separate an element into its isotopes. Then, calculate the average atomic mass by considering the mass and abundance of each isotope. 5 Minute Preview
3.g: develop and use models, including electron configuration of atoms and ions, to predict an element's chemical properties
Electron Configuration
Create the electron configuration of any element by filling electron orbitals. Determine the relationship between electron configuration and atomic radius. Discover trends in atomic radii across periods and down families/groups of the periodic table. 5 Minute Preview
3.h: use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms (i.e. including atomic radii, ionization energy, and electronegativity of various elements)
Electron Configuration
Create the electron configuration of any element by filling electron orbitals. Determine the relationship between electron configuration and atomic radius. Discover trends in atomic radii across periods and down families/groups of the periodic table. 5 Minute Preview
Periodic Trends
Explore trends in atomic radius, ionization energy, and electron affinity in the periodic table. Measure atomic radius with a ruler and model ionization energy and electron affinity by exploring how easy it is to remove electrons and how strongly atoms attract additional electrons. View these properties on the whole periodic table to see how they vary across periods and down groups. 5 Minute Preview
3.i: construct an explanation about the relationship between the reactivity of an element and its position on the periodic table
Periodic Trends
Explore trends in atomic radius, ionization energy, and electron affinity in the periodic table. Measure atomic radius with a ruler and model ionization energy and electron affinity by exploring how easy it is to remove electrons and how strongly atoms attract additional electrons. View these properties on the whole periodic table to see how they vary across periods and down groups. 5 Minute Preview
3.j: use the periodic table as a model to predict the relative ionic radii of elements based on the patterns of electrons in the outermost energy level of atoms (Honors Extension)
Electron Configuration
Create the electron configuration of any element by filling electron orbitals. Determine the relationship between electron configuration and atomic radius. Discover trends in atomic radii across periods and down families/groups of the periodic table. 5 Minute Preview
3.k: use the concepts of Aufbau, Pauli, and Hund?s Rule to develop models of Orbital diagrams (Honors Extension)
Electron Configuration
Create the electron configuration of any element by filling electron orbitals. Determine the relationship between electron configuration and atomic radius. Discover trends in atomic radii across periods and down families/groups of the periodic table. 5 Minute Preview
4: obtain, evaluate, and communicate information about how the Law of Conservation of Matter is used to determine chemical composition in compounds and chemical reactions
4.a: predict the products of single and double displacement reactions based on the valence electron states of atoms
Chemical Changes
Chemical changes result in the formation of new substances. But how can you tell if a chemical change has occurred? Explore this question by observing and measuring a variety of chemical reactions. Along the way you will learn about chemical equations, acids and bases, exothermic and endothermic reactions, and conservation of matter. 5 Minute Preview
4.c: use mathematics and computational thinking to balance chemical reactions (i.e., synthesis, decomposition, single replacement, double replacement, and combustion)
Balancing Chemical Equations
Balance and classify five types of chemical reactions: synthesis, decomposition, single replacement, double replacement, and combustion. While balancing the reactions, the number of atoms on each side is presented as visual, histogram, and numerical data. 5 Minute Preview
4.d: plan and carry out an investigation to determine and use data to justify that a new chemical has formed by identifying indicators of a chemical reaction (specifically precipitate formation, gas evolution, color change, water production, and changes in energy to system)
Chemical Changes
Chemical changes result in the formation of new substances. But how can you tell if a chemical change has occurred? Explore this question by observing and measuring a variety of chemical reactions. Along the way you will learn about chemical equations, acids and bases, exothermic and endothermic reactions, and conservation of matter. 5 Minute Preview
4.e: use mathematics and computational thinking to apply concepts of the mole and Avogadro's number to conceptualize and calculate percent composition, emperical/molecular formulas, and mass, mole and particle relationships
Moles
Understand the definition of a mole and determine the Avogadro constant by adding atoms or formula units to a balance until the mass in grams is equal to the atomic or formula mass. Manipulate a conceptual model to understand how the number of particles, the number of moles, and the mass are related. Then use dimensional analysis to convert between particles, moles, and mass. 5 Minute Preview
Stoichiometry
Solve problems in chemistry using dimensional analysis. Select appropriate tiles so that units in the question are converted into units of the answer. Tiles can be flipped, and answers can be calculated once the appropriate unit conversions have been applied. 5 Minute Preview
4.f: use mathematics and computational thinking to identify and solve different types of reaction stoichiometry problems (i.e., mass to moles, mass to mass, moles to moles, and percent yield) using significant figures
Moles
Understand the definition of a mole and determine the Avogadro constant by adding atoms or formula units to a balance until the mass in grams is equal to the atomic or formula mass. Manipulate a conceptual model to understand how the number of particles, the number of moles, and the mass are related. Then use dimensional analysis to convert between particles, moles, and mass. 5 Minute Preview
Stoichiometry
Solve problems in chemistry using dimensional analysis. Select appropriate tiles so that units in the question are converted into units of the answer. Tiles can be flipped, and answers can be calculated once the appropriate unit conversions have been applied. 5 Minute Preview
4.g: plan and carry out an investigation to demonstrate the conceptual principle of limiting reactants
Limiting Reactants
Explore the concepts of limiting reactants, excess reactants, and theoretical yield in a chemical reaction. Select one of two different reactions, choose the number of molecules of each reactant, and then observe the products created and the reactants left over. 5 Minute Preview
4.j: use mathematics and computational thinking to calculate limiting and excess reactant amounts (Honors Extension)
Limiting Reactants
Explore the concepts of limiting reactants, excess reactants, and theoretical yield in a chemical reaction. Select one of two different reactions, choose the number of molecules of each reactant, and then observe the products created and the reactants left over. 5 Minute Preview
5: obtain, evaluate, and communicate information about the properties that describe solutions and the nature of acids and bases
5.e: develop and use a model to explain the effects of a solute on boiling point and freezing point
Colligative Properties
Determine how the physical properties of a solvent are dependent on the number of solute particles present. Measure the vapor pressure, boiling point, freezing point, and osmotic pressure of pure water and a variety of solutions. Compare the effects of four solutes (sucrose, sodium chloride, calcium chloride, and potassium chloride) on these physical properties. 5 Minute Preview
Freezing Point of Salt Water
Control the temperature of a beaker of water. As the temperature drops below the freezing point, a transformation of state will occur that can be viewed on a molecular level. Salt can be added to the water to see its effect on the freezing point of water. 5 Minute Preview
5.f: construct a solubility curve and interpret it based on saturated and unsaturated solutions to explain the relationship between solubility and temperature
Solubility and Temperature
Add varying amounts of a chemical to a beaker of water to create a solution, observe that the chemical dissolves in the water at first, and then measure the concentration of the solution at the saturation point. Either potassium nitrate or sodium chloride can be added to the water, and the temperature of the water can be adjusted. 5 Minute Preview
5.i: plan and carry out an investigation to explore acid-base neutralization
Titration
Measure the quantity of a known solution needed to neutralize an acid or base of unknown concentration. Use this information to calculate the unknown concentration. A variety of indicators can be used to show the pH of the solution. 5 Minute Preview
5.m: plan and carry out a titration investigation (Honors Extension)
Titration
Measure the quantity of a known solution needed to neutralize an acid or base of unknown concentration. Use this information to calculate the unknown concentration. A variety of indicators can be used to show the pH of the solution. 5 Minute Preview
6: obtain, evaluate, and communicate information about the Kinetic Molecular Theory to model atomic and molecular motion in chemical and physical processes
6.a: plan and carry out an investigation to calculate the amount of heat absorbed or released by chemical or physical processes
Calorimetry Lab
Investigate how calorimetry can be used to find relative specific heat values when different substances are mixed with water. Modify initial mass and temperature values to see effects on the system. One or any combination of the substances can be mixed with water. A dynamic graph (temperature vs. time) shows temperatures of the individual substances after mixing. 5 Minute Preview
Reaction Energy
Exothermic chemical reactions release energy, while endothermic reactions absorb energy. But what causes some reactions to be exothermic, and others to be endothermic? In this simulation, compare the energy absorbed in breaking bonds to the energy released in forming bonds to determine if a reaction will be exothermic or endothermic. 5 Minute Preview
6.b: construct an explanation using a heating curve as evidence of the effects of energy and intermolecular forces on phase changes
Phase Changes
Explore the relationship between molecular motion, temperature, and phase changes. Compare the molecular structure of solids, liquids, and gases. Graph temperature changes as ice is melted and water is boiled. Find the effect of altitude on phase changes. The starting temperature, ice volume, altitude, and rate of heating or cooling can be adjusted. 5 Minute Preview
6.c: develop and use models to quantitatively, conceptually, and graphically represent the relationships between pressure, volume, temperature, and number of moles of a gas (i.e. Boyle?s, Charles?, Gay-Lussac?s, and Ideal Gas Law)
Ideal Gas Law
Explore relationships between amount, temperature, pressure, and volume for an ideal gas in a chamber with a moveable piston. Discover rules of proportionality contained in Boyle's law, Charles's law, Avogadro's law, and Gay-Lussac's law. Use these relationships to derive the ideal gas law and calculate the value of the ideal gas constant. 5 Minute Preview
6.f: use mathematics and computational thinking to determine Dalton?s Law of partial pressures (Honors Entension)
Equilibrium and Pressure
Observe how reactants and products interact in reversible reactions. The amounts of each substance can be manipulated, as well as the pressure on the chamber. This lesson focuses on partial pressures, Dalton's law, and Le Chatelier's principle. 5 Minute Preview
7: obtain, evaluate, and communicate information about how to refine the design of a chemical system by applying engineering principles to manipulate the factors that affect a chemical reaction
7.a: construct an argument using collision theory (activation energy, orientation, nature of reactants) and transition state theory to explain the role of activation energy in chemical reactions
Collision Theory
Observe a chemical reaction with and without a catalyst. Determine the effects of concentration, temperature, surface area, and catalysts on reaction rates. Reactant and product concentrations through time are recorded, and the speed of the simulation can be adjusted by the user. 5 Minute Preview
7.b: construct an explanation of the effects of a catalyst on chemical reactions and apply it to everyday examples
Collision Theory
Observe a chemical reaction with and without a catalyst. Determine the effects of concentration, temperature, surface area, and catalysts on reaction rates. Reactant and product concentrations through time are recorded, and the speed of the simulation can be adjusted by the user. 5 Minute Preview
7.c: plan and carry out an investigation to provide evidence of the effects of changing concentration, temperature, and pressure on chemical reactions
Equilibrium and Concentration
Observe how reactants and products interact in reversible reactions. The initial amount of each substance can be manipulated, as well as the pressure on the chamber. The amounts, concentrations, and partial pressures of each reactant and product can be tracked over time as the reaction proceeds toward equilibrium. 5 Minute Preview
Equilibrium and Pressure
Observe how reactants and products interact in reversible reactions. The amounts of each substance can be manipulated, as well as the pressure on the chamber. This lesson focuses on partial pressures, Dalton's law, and Le Chatelier's principle. 5 Minute Preview
Ocean Carbon Equilibrium - High School
Mussel farmers in the Arctic Ocean have reported problems with their mussels. They have noticed that the mussel shells have eroded and become brittle. Students take on the role of a marine chemist to analyze the changes to ocean carbon chemistry and equilibrium to determine the cause of the mussel shell erosion. Video Preview
7.d: refine the design of a chemical system by altering the conditions that would change forward and reverse reaction rates and the amount of products at equilibrium
Equilibrium and Concentration
Observe how reactants and products interact in reversible reactions. The initial amount of each substance can be manipulated, as well as the pressure on the chamber. The amounts, concentrations, and partial pressures of each reactant and product can be tracked over time as the reaction proceeds toward equilibrium. 5 Minute Preview
Equilibrium and Pressure
Observe how reactants and products interact in reversible reactions. The amounts of each substance can be manipulated, as well as the pressure on the chamber. This lesson focuses on partial pressures, Dalton's law, and Le Chatelier's principle. 5 Minute Preview
Ocean Carbon Equilibrium - High School
Mussel farmers in the Arctic Ocean have reported problems with their mussels. They have noticed that the mussel shells have eroded and become brittle. Students take on the role of a marine chemist to analyze the changes to ocean carbon chemistry and equilibrium to determine the cause of the mussel shell erosion. Video Preview
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Start teaching with 20-40 Free Gizmos. See the full list.
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Students assume the role of a scientist trying to solve a real world problem. They use scientific practices to collect and analyze data, and form and test a hypothesis as they solve the problems.
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